Switchgrass Cultivar/Ecotype Selection and Management for Biofuels in the Upper Southeast USA
Table 5
Effect of management (one-cut (low input and management) and two-cut (high input and management)), year, and cultivar on yield of switchgrass grown at eight locations in upper southeast USA (CIR: Cave-in-Rock).
Cuttings/N
Year
Cultivar
Location1
Mean
KY
NC
TN1
TN2
VA1
VA2
VA3
WV
Yield (Mg/ha)
One/50 kg
2000
Alamo
15.5
14.7
7.8
20.8
9.5
17.1
19.8
15.5
15.1
4.5
Kanlow
16.4
14.8
11.0
15.5
11.1
18.9
16.6
18.3
15.3
3.7
CIR
10.1
10.5
8.3
14.4
14.2
11.9
15.0
13.6
12.2
3.1
Shelter
8.4
8.3
7.9
11.8
10.3
12.0
11.2
12.8
10.3
3.0
Mean
12.6
12.1
8.7
15.6
11.3
15.0
15.6
15.1
13.2
2.0
2.3
3.7
2.8
3.1
4.2
4.9
5.2
3.4
1.4
—
2001
Alamo
13.6
7.4
11.6
24.9
10.6
27.4
17.6
18.2
16.4
4.9
Kanlow
14.8
6.9
12.7
22.4
13.7
22.2
20.0
20.5
16.8
5.3
CIR
13.2
6.2
8.2
13.8
9.6
18.4
12.6
15.7
12.2
3.6
Shelter
10.6
5.1
8.7
11.2
9.7
11.7
12.2
16.7
10.7
3.4
Mean
13.1
6.4
10.3
18.1
10.9
19.9
15.6
17.8
14.0
2.4
3.1
1.8
3.0
4.7
3.6
8.0
6.4
3.2
1.7
—
Mean
12.8
9.2
9.5
16.9
11.1
17.4
15.6
16.4
13.6
2.1
Two/100 kg
2000
Alamo
17.0
16.7
10.2
16.9
15.8
22.4
20.4
15.2
16.8
4.6
Kanlow
15.8
15.7
11.7
14.1
16.1
21.3
19.4
15.4
16.2
3.7
CIR
13.4
16.7
14.2
16.7
17.2
20.5
19.6
16.4
16.8
3.3
Shelter
11.4
13.9
9.8
14.2
16.8
17.4
15.7
14.3
14.2
3.6
Mean
14.4
15.7
11.5
15.5
16.5
20.4
18.7
15.3
16.0
1.8
2.5
1.9
NS5
1.9
NS
3.2
NS
0.8
1.2
—
2001
Alamo
15.2
9.7
16.6
17.9
13.7
19.7
15.1
13.0
15.1
4.6
Kanlow
14.7
9.1
15.5
15.0
16.5
19.9
14.2
13.8
14.8
4.4
CIR
13.6
10.2
16.9
17.0
14.6
16.7
15.5
15.7
15.1
3.4
Shelter
10.7
8.8
12.9
15.2
13.2
18.0
13.6
14.7
13.4
3.0
Mean
13.6
9.5
15.5
16.3
14.5
18.6
14.6
14.3
14.6
1.9
1.7
NS
NS
2.4
3.2
NS
NS
1.4
1.3
—
Mean
14.0
12.6
13.5
15.9
15.5
19.5
16.7
14.8
15.3
0.9
NS
1.9
1.7
NS
1.2
NS
NS
1.2
1.3
—
Locations: KY (Princeton), NC (Raleigh), TN1 (Jackson), TN2 (Knoxville), VA1,2 (Blacksburg), VA3 (Orange), and WV (Morgantown); 2LSD for comparison of cultivars within cutting, year, and location; 3LSD for comparison of locations within a management, year, and cultivar; 4LSD for comparison of means between managements; 5NS: not significant.